code: def name():
      # return None because Mars is default scheme
      return
  
file_path: mars/mars/oscar/backends/mars/backend.py
imports: from typing import Dict
  from ...backend import BaseActorBackend, register_backend
  from ..context import MarsActorContext
  from .driver import MarsActorDriver
  from .pool import MainActorPool
label_desc: Use image node_id 1 for calling the MarsActorBackend obj's underlying member method code with example usage: obj.name() without return types